JPH11335209A - Herbicidal composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the subject herbicidal composition that has high safety, excellent quick-acting properties and residual activity and permits simple weeding operation in no need of the labor for preliminary weed cutting. SOLUTION: The objective composition comprises (A) a fatty acid, its salt or its ester and (B) a plant growth regulator as active ingredients. In a preferred embodiment, the fatty acid is a 6-18C saturated or unsaturated monocarboxylic acid, for example, nonanoic acid, the fatty acid salt is its sodium or potassium salt, and the ester of the fatty acid is preferably its ethylene glycol monoester. The component B is a substance having the growth-inhibiting action, for example, paclobutrazol, mefluidide or the like. This composition may include a liquid carrier, for example, aliphatic hydrocarbons or the like, a surfactant, for example, polyoxyethylene alkyl-aryl ether or the like. In this composition, the content of the component A is preferably 25-60 wt.%, while the component B is 0.5-10 wt.%.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a composition for controlling weeds, comprising a fatty acid or a salt or ester thereof and a plant growth regulator as active ingredients.
And a method for controlling weeds using the same.

[0002]

BACKGROUND ART Over the years of research and development of herbicides,
To date, an extremely large number of herbicides for agricultural land and non-agricultural land have been developed, and these herbicides have achieved great effects, such as improving productivity and saving labor in weeding operations.
However, on the other hand, in recent years, the effect of the herbicide on the environment has been highlighted as a major problem, and there is a strong demand for the development of safer herbicides and further reduction in the amount used. Straight-chain fatty acids are a group of compounds widely existing in nature as components of fats constituting living bodies and others, and are generally rapidly degraded by microorganisms, and are extremely safe for humans and animals.

[0003]

An advantage of fatty acid herbicides is their remarkable immediate action and non-selectivity in addition to safety. However, since fatty acid pesticides are non-migratory and do not kill the roots of weeds, they have the disadvantage that weeds are regenerated quickly and have poor residual efficacy. On the other hand, plant growth regulators suppress the growth of weeds over a long period of time, but their effect is slow to express, and there is a problem in the case where it is desired to quickly control weeds that have already occurred, particularly those that have grown in advance. . For example, when it is necessary to control weeds promptly for maintenance and security, such as in railway track sections and road shoulders, conventional plant growth regulators have not been satisfactory. In addition, in order to use the conventional plant growth regulator, it was necessary to cut down weeds and then spray the plant growth regulator. An object of the present invention is to solve the drawbacks of these two types of herbicides, and to provide a herbicide that is highly safe and has excellent immediate and residual effects.

[0004]

Means for Solving the Problems The present inventors have solved the drawbacks of these two agents having different properties by mixing and treating a weed with a mixture of a fatty acid herbicide and a plant growth regulator. The present inventors have found that the herbicidal effect is synergistically improved by mixing the two agents, and completed the present invention. That is, the present invention is a composition for controlling weeds, comprising a fatty acid or a salt or ester thereof and a plant growth regulator as active ingredients. The present invention is also a method for controlling weeds using the above-described composition for controlling weeds.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail. The weed controlling composition of the present invention is characterized by containing a fatty acid or a salt or ester thereof and a plant growth regulator as active ingredients. The fatty acid used in the present invention may be any as long as it can control weeds, but it is preferable to use a saturated or unsaturated monocarboxylic acid having 6 to 18 carbon atoms. Specifically, it is preferable to use caprylic acid, nonanoic acid, capric acid, undecanoic acid, linoleic acid, and the like, and among these, nonanoic acid is particularly preferable. Examples of the salts of fatty acids include sodium salts and potassium salts, and examples of the esters of fatty acids include ethylene glycol monoester and propylene glycol monoester.

[0006] The plant growth regulator used in the present invention is not particularly limited, but it is preferable to use a substance having a growth inhibitory action. Specifically, it is preferable to use paclobutrazol, mefluidide, bispyribac, flurprimidol, ancimidol, daminogit, inabenfide, uniconazole, chlormequat, mepiquat chloride, etc., among these, paclobutrazol, It is particularly preferred to use mefluidide. The plant growth regulating substance may be used alone, or two or more substances may be used in combination.

The composition of the present invention may contain a liquid carrier, a surfactant and the like in addition to the fatty acid and the like and the plant growth regulator. Examples of the liquid carrier include various organic solvents, and examples thereof include aliphatic hydrocarbons, aromatic hydrocarbons, ethers, ketones, and alcohols. Examples of the surfactant include non-ionic surfactants such as polyoxyethylene alkyl allyl ether, polyoxyethylene alkyl ether, sorbitan fatty acid ester, and polyoxyethylene sorbitan fatty acid ester, and salts such as alkyl sulfate ester salt and alkyl aryl sulfonate salt. Ionic surfactants and the like. The content of the fatty acid and the like in the composition is not particularly limited, but is preferably 20 to 80% by weight, and particularly preferably 25 to 60% by weight. Although the content of the plant growth regulator is not particularly limited, it is 0.2 to
It is preferably 15% by weight, particularly preferably 0.5 to 10% by weight.

[0008] The composition of the present invention may be produced by any method. However, herbicides containing fatty acids and the like and herbicides containing plant growth regulators are commercially available. It is preferable to mix and manufacture the composition. Examples of commercially available herbicides containing fatty acids and the like include Grantrico emulsion (Nippon Tobacco), and examples of commercially available herbicides containing plant growth regulators include Smalect containing paclobutrazole (ICI Japan, Nippon Pesticide, Takeda Pharmaceutical,
Ishihara Sangyo Agro), Bounty (ICI Japan, Nippon Pesticide, Takeda Pharmaceutical, Nissan Chemical), Bonsai (ICI Japan,
Nippon Pesticide, Takeda Pharmaceuticals), Embark containing mefluidide (Nissan Chemical), Trimid Flowable containing paclobutrazol and mefluidide (ICI Japan, Nippon Pesticide, Takeda Pharmaceuticals, Nissan Chemical), Short Keeping containing Bispyribac (RIKEN Green) ), Suritone containing ancimidol (Takeda Pharmaceutical Co., Ltd.), Greenfield containing Flurprimidol (Shionogi Pharmaceutical Co., Dowelanco Japan), Bean Nine containing daminogit (Nippon Soda, Yasu Chemical),
Ceritad containing Inabenfide (Chugai Pharmaceutical, Agros), P-Romica containing Uniconazole (Sumitomo Chemical, Kumiai Chemical, Nissan Chemical, Agros), Sumicen (Sumitomo Chemical, Agros), Psychocell containing Chlormequat (Nippon Cyanamid, Hokkai Sankyo, Sankyo, (Kyushu Sankyo), melastic chloride-containing flaster (BASF Japan, Nippon Soda) and the like. The mixing ratio of the herbicide containing a plant growth regulator and the herbicide containing a fatty acid is 1: 20-1: 1,
Desirably, the ratio is in the range of 1: 8-1: 2.

[0009] The weeds which can be controlled by the composition of the present invention include nobies, enokorogosa, crabgrass, oohishiba,
Grass weeds such as Poa annua, Acacia catechu, and Japanese pampas grass; And other cyperaceae weeds.
When the composition is made into a solution, the treatment concentration varies depending on the type of the composition and is not particularly limited, but is preferably 0.5 to 15%, more preferably 3 to 10%. The application amount of the composition of the present invention is not particularly limited, but per 10 ares,
It is preferably from 50 to 400 l, more preferably from 100 to 200 l.

[0010]

[Example 1] [Example 1] A 1m x 1m test plot was set up in the field, and kayak, mugwort, horsetail,
The herbicidal activity of the composition of the present invention on Japanese pampas grass (plant height 40-70 cm) was examined. Each test plot contains a fatty acid herbicide Glan Torico emulsion (containing 60% nonanoic acid as an active ingredient) and a plant growth regulator Trimid Flowable (paclobutrazol 18).
%, And 1.6% of mefluidide as active ingredients), and a mixture of the above-mentioned fatty acid herbicide alone in water diluted with water using a pressurized sprayer. Table 1 shows the concentration of the herbicide and the amount of the sprayed liquid sprayed in the test plot. The herbicidal activity was determined 2 hours, 1 week, 4 weeks, and 12 weeks after application, and the results are shown in Table 2. The herbicidal activity was expressed as a percentage based on 100% of complete death.

[0011]

[Table 1]

[0012]

[Table 2]

There was no difference in activity between the fatty acid single agent group and the mixed group until one week after the treatment, but from the fourth week onward, considerable weed regeneration was observed in the fatty acid single agent group. On the other hand, weed regeneration was strongly suppressed in the mixed plot.

Example 2 A test section of 10 cm × 10 cm was set in a greenhouse, and strawberries, lobsters,
The herbicidal activity of the composition of the present invention against Kusanem (plant height 9 cm to 15 cm) was examined. In each test plot, a mixture of the fatty acid herbicide Gran Torico emulsion and the plant growth regulator Trimid Flowable were mixed, and the fatty acid herbicide alone and the plant growth regulator alone diluted in water were used. The foliage was sprayed using a pressurized sprayer. Table 3 shows the concentration of the herbicide and the amount of the liquid sprayed in the test plot. One, three, three and six weeks after application, the herbicidal activity was determined, and the results are shown in Tables 4 to 6. The herbicidal activity was calculated in the same manner as in Example 1.

[0015]

[Table 3]

[0016]

[Table 4]

[0017]

[Table 5]

[0018]

[Table 6]

No difference in activity was observed between the fatty acid single agent group and the mixed group until the third day after the treatment, but considerable weed regeneration was observed in the fatty acid single agent group after the third week. In the week, it recovered to the same level as no treatment. In the plant growth regulator alone, the effect was seen from the third week, and the effect was continued after the sixth week, but the herbicidal activity was only about 30-40%. The effect of the mixed group was not different from that of the single fatty acid group until the third day, but a synergistic improvement in herbicidal activity was observed after the third week. As described above, with the fatty acid monotherapy, the effect immediately after the treatment was high, but no sustained effect was observed. In the plant growth regulator single agent group, the effect was gradually exhibited from the third week after the treatment, but the effect immediately after the treatment was not observed at all. On the other hand, the mixed group showed a high effect immediately after the treatment, and the effect was maintained for a long time.

[0020]

Industrial Applicability The present invention provides a composition for controlling weeds, which is highly safe for the environment, is excellent in immediate effect and residual effect, and a method for controlling weeds using the same. In addition, when spraying the weed controlling composition of the present invention, it is not necessary to cut off weeds in advance, so that weed control can be performed easily.

Continued on the front page (72) Inventor Masayasu Tanaka 6-2 Umegaoka, Aoba-ku, Yokohama-shi, Kanagawa Japan Tobacco Inc. Plant Protection Development Center

Claims (8)

[Claims] 1. A weed controlling composition comprising a fatty acid or a salt or ester thereof and a plant growth regulator as active ingredients. 2. The composition for controlling weeds according to claim 1, wherein the fatty acid is a saturated or unsaturated monocarboxylic acid having 6 to 18 carbon atoms. 3. The weed controlling composition according to claim 1, wherein the fatty acid is nonanoic acid. 4. The weed controlling composition according to claim 1, wherein the fatty acid salt is a sodium salt or a potassium salt. 5. The weed control composition according to claim 1, wherein the fatty acid ester is ethylene glycol monoester. 6. The composition for controlling weeds according to claim 1, wherein the plant growth regulating substance is a substance having a growth suppressing action. 7. The plant growth regulating substance is paclobutrazol, mefluidide, bispyribac, flurprimidol, ansimidol, daminozide, inabenfide,
The weed controlling composition according to claim 1, wherein the composition is at least one selected from the group consisting of uniconazole, chlormequat, and mepiquat chloride. 8. A method for controlling weeds using the composition for controlling weeds according to any one of claims 1 to 7.